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authorMark Haines <mjark@negativecurvature.net>2016-05-26 13:25:34 +0100
committerMark Haines <mjark@negativecurvature.net>2016-05-26 13:25:34 +0100
commitbfeb554e8699c5cb90cab14dc74e15c30f963d74 (patch)
tree64dfe3776f06874fa591a28b5ff7456c8824b1c0 /fuzzers/fuzz_group_decrypt.cpp
parentee8172d882e853e737ac7e8b00fb760f21e80bfe (diff)
Add a fuzzer for olm_group_decrypt
Diffstat (limited to 'fuzzers/fuzz_group_decrypt.cpp')
-rw-r--r--fuzzers/fuzz_group_decrypt.cpp71
1 files changed, 71 insertions, 0 deletions
diff --git a/fuzzers/fuzz_group_decrypt.cpp b/fuzzers/fuzz_group_decrypt.cpp
new file mode 100644
index 0000000..1fc99d7
--- /dev/null
+++ b/fuzzers/fuzz_group_decrypt.cpp
@@ -0,0 +1,71 @@
+#include "olm/olm.hh"
+
+#include "fuzzing.hh"
+
+int main(int argc, const char *argv[]) {
+ size_t ignored;
+ if (argc <= 2) {
+ const char * message = "Usage: decrypt <pickle_key> <group_session>\n";
+ ignored = write(STDERR_FILENO, message, strlen(message));
+ exit(3);
+ }
+
+ const char * key = argv[1];
+ size_t key_length = strlen(key);
+
+
+ int session_fd = check_errno(
+ "Error opening session file", open(argv[2], O_RDONLY)
+ );
+
+ uint8_t *session_buffer;
+ ssize_t session_length = check_errno(
+ "Error reading session file", read_file(session_fd, &session_buffer)
+ );
+
+ int message_fd = STDIN_FILENO;
+ uint8_t * message_buffer;
+ ssize_t message_length = check_errno(
+ "Error reading message file", read_file(message_fd, &message_buffer)
+ );
+
+ uint8_t * tmp_buffer = (uint8_t *) malloc(message_length);
+ memcpy(tmp_buffer, message_buffer, message_length);
+
+ uint8_t session_memory[olm_inbound_group_session_size()];
+ OlmInboundGroupSession * session = olm_inbound_group_session(session_memory);
+ check_error(
+ olm_inbound_group_session_last_error,
+ session,
+ "Error unpickling session",
+ olm_unpickle_inbound_group_session(
+ session, key, key_length, session_buffer, session_length
+ )
+ );
+
+ size_t max_length = check_error(
+ olm_inbound_group_session_last_error,
+ session,
+ "Error getting plaintext length",
+ olm_group_decrypt_max_plaintext_length(
+ session, tmp_buffer, message_length
+ )
+ );
+
+ uint8_t plaintext[max_length];
+
+ size_t length = check_error(
+ olm_inbound_group_session_last_error,
+ session,
+ "Error decrypting message",
+ olm_group_decrypt(
+ session,
+ message_buffer, message_length,
+ plaintext, max_length
+ )
+ );
+
+ ignored = write(STDOUT_FILENO, plaintext, length);
+ ignored = write(STDOUT_FILENO, "\n", 1);
+ return ignored;
+}